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System for observing objects

a technology for observing objects and objects, applied in the field of systems for observing objects, can solve the problems of inability to obtain transmission patterns, inability to obtain images in transmission,

Active Publication Date: 2019-04-02
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a system that can see objects on a non-see-through surface. This makes it easier to observe objects on things that are not completely transparent.

Problems solved by technology

However, such a transmission pattern cannot be obtained when the substrate includes blood, since the low transmission coefficient of blood prevents obtaining the diffraction pattern.
Indeed, in the aforementioned documents, image obtainment in transmission does not work when the substrate and its holder are opaque.

Method used

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  • System for observing objects
  • System for observing objects
  • System for observing objects

Examples

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Embodiment Construction

[0039]A system for observing an object, called system 1, is shown in FIG. 1.

[0040]The system 1 makes it possible to observe a sample 11.

[0041]The sample 11 comprises a set of particles and a substrate holding the set of particles.

[0042]“Particles” refer to micrometric particles, for example cells, microorganisms. The microorganisms can, in particular bacteria, be able to be alongside one another, so as to form bacterial colonies, spores, fungi or yeasts. It is considered below that the set of particles is situated on the surface of a substrate.

[0043]Each particle has a maximal extension in one direction. Maximal extension means a characteristic size of the set of organisms. This for example is the diameter of the circle in which the set of organisms fits. In general, the invention applies to organisms or sets of organisms whose maximal extension is comprised between 100 nanometers (nm) and 1 millimeter (mm), preferably between 1 micrometer (μm) and 500 μm.

[0044]According to one part...

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Abstract

A system is provided for observing objects on a substrate which includes a light source that emits polarized light rectilinearly along a first direction, a holder that receives said substrate having a surface and includes objects, wherein at least one of the holder or the substrate are translucent or opaque, a detector that collects the backscattered light from the interaction between the light emitting by the light source and the objects, a polarization splitter and a quarter-wave plate wherein the polarization splitter and the quarter-wave plate are arranged so that the polarization splitter directs light towards the substrate through the quarter-wave plate, and wherein the light forms a beam and the system modifies the size of the beam. The system thus allows one to observe objects on a non-transparent substrate.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a system for observing objects.BACKGROUND OF THE INVENTION[0002]It is known from documents US 2008 / 0310692 A1, U.S. Pat. No. 7,465,560 B2 and EP 2,122,326 B1 to determine the biological species of a bacterium by studying the transmission pattern obtained by the diffusion of incident photons by the bacteria, the bacterium being on a substrate.[0003]However, such a transmission pattern cannot be obtained when the substrate includes blood, since the low transmission coefficient of blood prevents obtaining the diffraction pattern. Indeed, in the aforementioned documents, image obtainment in transmission does not work when the substrate and its holder are opaque.SUMMARY OF THE INVENTION[0004]There is therefore a need for a system for observing objects making it possible to observe the objects on a non-transparent substrate.[0005]To that end, a system for observing objects is proposed including a light source able to emit polari...

Claims

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Application Information

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IPC IPC(8): G01N21/47G02B21/00G03H1/04
CPCG01N21/474G01N21/4788G02B21/0092G01N2021/4792G03H2223/20G03H2001/0447G03H2001/0452G03H2001/0469G03H2222/31G03H2001/045
Inventor GENUER, VALENTINMARCOUX, PIERRESCHULTZ, EMMANUELLE
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES